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Share arbitrary images via Snapchat. This is an Xposed framework module.
Java

README.md

Snapshare

Project moved!

I stopped developing this mod, @P1nGu1n picked up development at https://github.com/P1nGu1n/Snapshare After the Snapchat devs introduced the usage of Proguard, it's not fun anymore... ;)

Introduction

This programme lets you share any image via Snapchat, not only pictures you take with the camera from within Snapchat. When you are viewing an image and click on share, Snapshare will pop up as an option. It will load Snapchat and lets you even paint on the image as if you had just taken it with your camera from within Snapchat.

It uses the Xposed framework to intercept launches of Snapchat from Snapshare and do the magic.

A compiled APK can be downloaded from the Releases tab.

The software was created using Android Studio with gradle on an Arch Linux machine.

Quick Installation

Note: Obviously, you need root access on your phone.

  1. Download the Xposed Installer APK from the above XDA thread
  2. Install the app, run it, let it install the framework
  3. Download and install my APK from the above Bintray link
  4. Activate it in the Xposed Installer app
  5. Soft reboot

To Do

  • Video sharing. I think this is actually easier than image sharing, because internally Snapchat also works with URI's to videos, instead of Bitmap Objects, like in the case of images.
  • Adding Borders to the image, instead of cropping it, to fit the display area's size. Especially if you want to share, e.g. square Instagram images, this is probably preferable.

Troubleshooting/Bugs

It happened to me a few times, that after loading an image into Snapchat with Snapshare, clicking the Send Button didn't have any affect. I couldn't reproduce this bug in my latest testing though, so please let me know if this happens to you.

If you encounter any problems or bugs with this mod, please open logcat like this

adb logcat -v time ActivityManager:I Snapshare:D "*:S"

then reproduce the error and report the relevant output (That's why I choose to display the time in logcat's output, I don't wanna have your logcat of the last few days ;) ).

The code still contains many debugging Log.d() statements. I might remove them, at least from releases, in the future, when the mod seems to work flawlessly on different devices and roms.

Technical Details

Snapshare introduces an Activity which presents itself to the Android system as a receiver of images. When launched by a share action (ACTION_SEND as the Intent action), it launches the main launch Activity of Snapchat, called com.snapchat.android.LandingPageActivity with the same intent. So basically, it functions as a wrapper around Snapchat to be a receiver of images.

The next step uses the Xposed framework to hook after the onCreate() method of the LandingPageActivity. Now if the Intent is an ACTION_SEND Intent, Snapchat must have been launched by Snapshare's image receiver Activity and the image URI is loaded into a Bitmap.

Before passing that Bitmap to Snapchat, the image is rotated if necessary, then cropped so that its aspect ratio is that of the display's viewing area and finally resized if it is larger that the viewing area.

Now an instance of com.snapchat.android.util.eventbus.SnapCapturedEvent is created with the just created Bitmap passed to the constructor. Finally, this instance is passed to the method onSnapCaptured() of the LandingPageActivity, which will load the SnapPreviewFragment displaying the image. Shazam!

License

I like the GNU GPL, see the LICENSE file for further information.

Copyright (C) 2013 Sebastian Stammler

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